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Carbon nanotube directed three-dimensional porous Li2FeSiO4 composite for lithium batteriesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 сентября 2017 г.
- Авторы: Wang W.C., Liang H.C., Zhang L., Savilov S.V., Ni J., Liang Li
- Журнал: Nano Research
- Том: 10
- Номер: 1
- Год издания: 2017
- Издательство: Tsinghua Univ Press
- Местоположение издательства: China
- Первая страница: 229
- Последняя страница: 237
- Аннотация: Lithium iron silicate (Li2FeSiO4) is capable of affording a much higher capacity than conventional cathodes, and thus, it shows great promise for high-energy battery applications. However, its capacity has often been adversely affected by poor reaction activity due to the extremely low electronic and ionic conductivity of silicates. Here, we for the first time report on a rational engineering strategy towards a highly active Li2FeSiO4 by designing a carbon nanotube (CNT) directed three-dimensional (3D) porous Li2FeSiO4 composite. As the CNT framework enables rapid electron transport, and the rich pores allow efficient electrolyte penetration, this unique 3D Li2FeSiO4-CNT composite exhibits a high capacity of 214 mAh·g−1 and retains 96% of this value over 40 cycles, thus, outstripping many previously reported Li2FeSiO4-based materials. Kinetic analysis reveals a high Li+ diffusivity due to coupling of the migration of electrons and ions. This research highlights the potential for engineering 3D porous structure to construct highly efficient electrodes for battery applications.
- Добавил в систему: Савилов Сергей Вячеславович